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AssigneesToyota Jidosha Kabushiki Kaisha, Aisin Aw Co., Ltd.
InventorsEiji Ichioka, Kinya Yoshii, Takeharu Koide, Mitsuhiro Umeyama, Makoto Funahashi, Takashi Shimizu, Yoshihiko Sasaki, Masahiro Hasebe
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A planetary gear device including a first gear, a second gear, a carrier, and composite planetary gears each having a large- and a small-diameter pinion that are formed integrally with each other and arranged in the axial direction. The composite planetary gears are mounted rotatably on respective pinion shafts such that the composite planetary gears are axially movable over predetermined distances due to axial plays, and the pinion shafts are supported by the carrier such that the pinion shafts are disposed around an axis of the carrier. The pinions of the composite planetary gears mesh with the first and second gears, respectively. Each of the first and second gears and the pinions consists of a helical gear whose teeth have a helix angle with respect to the axis. The large-diameter and small-diameter pinions have the same direction of helix and the same amount of lead.
A planetary gear device including a first gear, a second gear, a carrier, and a plurality of composite planetary gears each having a large-diameter pinion and a small-diameter pinion that are formed integrally with each other and arranged in an axial direction thereof, said composite planetary gears being mounted rotatably on respective pinion shafts such that said composite planetary gears are axially movable over predetermined distances due to axial plays, said pinion shafts being supported by said carrier such that said pinion shafts are disposed around an axis of said carrier, said large-diameter pinions and said small-diameter pinions of said composite planetary gears meshing with said first and second gears, respectively, each of said first and second gears and said large-diameter and small-diameter pinions consisting of a helical gear whose teeth have a helix angle with respect to an axis thereof, wherein the improvement comprises:
A power transmitting system for an electric vehicle, having a motor shaft, a planetary gear device connected to said motor shaft, a differential gear device operatively connected to said planetary gear device and to right and left wheels of the vehicle, said planetary gear device including a first gear, a second gear, a carrier, and a plurality of composite planetary gears each having a large-diameter pinion and a small-diameter pinion that are formed integrally with each other and arranged in an axial direction thereof, said composite planetary gears being mounted rotatably on respective pinion shafts such that said composite planetary gears are axially movable over predetermined distances due to axial plays, said pinion shafts being supported by said carrier such that said pinion shafts are disposed around an axis of said carrier, said large-diameter pinions and said small-diameter pinions of said composite planetary gears meshing with said first and second gears, respectively, each of said first and second gears and said large-diameter and small-diameter pinions consisting of a helical gear whose teeth have a helix angle with respect to an axis thereof, wherein the improvement comprises:
Dependencies are inferred from the claim text.